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为了将轴承滚动体研磨钢泥制得的还原铁粉应用于汽车减震器活塞的生产中,在其中加入石墨、电解铜粉及羰基铁粉等制成合金粉末,并压制、烧结成型,通过正交试验探讨石墨、电解铜粉及羰基铁粉质量分数对试样组织和性能的影响。结果表明,碳对硬度和抗拉强度的影响最大,铜的影响较小;随石墨和铜粉质量分数的增大,铁素体减少,珠光体增多;得出成分为Fe-1.2C-1.8Cu-10羰基铁粉的合金符合汽车减震器铁基粉末冶金零件技术条件JB/T 9138-1999的要求。
In order to be used in the manufacture of automobile shock absorber pistons, the reduced iron powder obtained by grinding the steel balls of the bearing rolling body is made into the alloy powder by graphite, electrolytic copper powder and carbonyl iron powder and the like, pressed, sintered and passed through The effects of graphite, electrolytic copper powder and carbonyl iron powder mass fraction on microstructure and properties were investigated by orthogonal test. The results show that carbon has the greatest effect on the hardness and tensile strength and the effect of copper is small. With the increase of the mass fraction of graphite and copper powder, the ferrite decreases and the pearlite increases. The composition is Fe-1.2C-1.8 The alloy of Cu-10 carbonyl iron powder conforms to the requirements of JB / T 9138-1999 for automobile shock absorber iron-base powder metallurgy parts.